Europe to Asia: Black, Caspian and Aral Sea basins. Introduced throughout the world. Wild stocks are only present naturally in rivers draining to the Black, Caspian and Aral Sea (Ref. 59043). A reophilic wild population in the Danube is assumed to be the origin of the European species; this population is now under threat (Ref. 13696).

Biology
Glossary
(e.g. epibenthic)

Adults inhabit warm, deep, slow-flowing and still waters such as lowland rivers and large, well vegetated lakes (Ref. 59043). Hardy and tolerant of a wide variety of conditions but generally favor large water bodies with slow flowing or standing water and soft bottom sediments. Thrive in large turbid rivers (Ref. 1998). Most active at dusk and dawn. Both adults and juveniles feed on a variety of benthic organisms and plant material. Spawns along shores or in backwaters. Adults often undertake considerable spawning migration to suitable backwaters and flooded meadows. Larvae survive only in very warm water among shallow submerged vegetation. River regulation and hybridization with domesticated stocks, East Asian congeners and their hybrids have caused continuous decline of wild populations (Ref. 59043). Utilized fresh and frozen (Ref. 9987). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size >200 cm; not recommended for home aquariums (Ref. 51539).

Spawn in marginal, shallow, weed-infested areas. A polytypic plastic species with a marked tendency to produce `varieties' and `races' in response to selective breeding and environmental influences. Carp is polygamous. A spawning female is usually followed by several males. Under tropical conditions carp breeds throughout the year. It is a seasonal spawner in temperate waters (Ref. 185). Females are known to lay more than a million eggs in a season; breeds at a temperature range of 15° C to 20°C; eggs hatch in 4 days (Ref. 6028). Obligatory plant spawners (Ref. 7471). "Adults often make considerable spawning migrations to suitable backwaters and flooded meadows. Individual females spawn with a few males in dense vegetation. The sticky eggs are attached to water plants or other submerged objects. Reproductive success is restricted to years when the water level starts rising in May and when high temperatures and flooding of terrestrial vegetation last for a long period during May and June" (Ref. 59043).